[Mac] Add the OS version check functions for 10.8.

base/mac/mac_util.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_MAC_MAC_UTIL_H_
 #define BASE_MAC_MAC_UTIL_H_
 #pragma once
 
 #include <AvailabilityMacros.h>
 #include <Carbon/Carbon.h>
@@ skipping 120 matching lines @@
 BASE_EXPORT bool IsOSLeopard();
 BASE_EXPORT bool IsOSLeopardOrEarlier();
 
 // Snow Leopard is Mac OS X 10.6, Darwin 10.
 BASE_EXPORT bool IsOSSnowLeopard();
 BASE_EXPORT bool IsOSSnowLeopardOrEarlier();
 BASE_EXPORT bool IsOSSnowLeopardOrLater();
 
 // Lion is Mac OS X 10.7, Darwin 11.
 BASE_EXPORT bool IsOSLion();
+BASE_EXPORT bool IsOSLionOrEarlier();
 BASE_EXPORT bool IsOSLionOrLater();
 
+// Mountain Lion is Mac OS X 10.8, Darwin 12.
+BASE_EXPORT bool IsOSMountainLion();
+BASE_EXPORT bool IsOSMountainLionOrEarlier();

[Mark Mentovai, 2012/03/14 03:30:38]

This should not be present. Instead, provide IsOSLaterThanMountainLion, and
remove IsOSLaterThanLion.

[Robert Sesek, 2012/03/14 14:46:22]

I think it should be present. It will just have to be added later, so might as
well future proof.

IsOSLaterThanLion is currently used by a few (1) things, which is why it's not
changed here. But I think that the function should be renamed to IsOSFutureCat()
because that's what all the callsites are expressing with this function. And
then we don't have to rename it with each new OS release.

+BASE_EXPORT bool IsOSMountainLionOrLater();
+
 // This should be infrequently used. It only makes sense to use this to avoid
 // codepaths that are very likely to break on future (unreleased, untested,
 // unborn) OS releases.
 BASE_EXPORT bool IsOSLaterThanLion();
 
 // When the deployment target is set, the code produced cannot run on earlier
 // OS releases. That enables some of the IsOS* family to be implemented as
 // constant-value inline functions. The MAC_OS_X_VERSION_MIN_REQUIRED macro
 // contains the value of the deployment target.
 
@@ skipping 10 matching lines @@
 #define BASE_MAC_MAC_UTIL_H_INLINED_GE_10_7
 inline bool IsOSSnowLeopard() { return false; }
 inline bool IsOSSnowLeopardOrEarlier() { return false; }
 inline bool IsOSLionOrLater() { return true; }
 #endif
 
 #if defined(MAC_OS_X_VERSION_10_7) && \
     MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_7
 #define BASE_MAC_MAC_UTIL_H_INLINED_GT_10_7
 inline bool IsOSLion() { return false; }
+inline bool IsOSLionOrEarlier() { return false; }
 inline bool IsOSLaterThanLion() { return true; }
 #endif
 
+#if defined(MAC_OS_X_VERSION_10_8) && \
+    MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_8
+#define BASE_MAC_MAC_UTIL_H_INLINED_GE_10_8
+inline bool IsOSMountainLionOrLater() { return true; }
+#endif
+
+#if defined(MAC_OS_X_VERSION_10_8) && \
+    MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_8
+#define BASE_MAC_MAC_UTIL_H_INLINED_GT_10_8
+inline bool IsOSMountainLion() { return false; }
+inline bool IsOSMountainLionOrEarlier() { return false; }
+#endif
+
 // Retrieve the system's model identifier string from the IOKit registry:
 // for example, "MacPro4,1", "MacBookPro6,1". Returns empty string upon
 // failure.
 BASE_EXPORT std::string GetModelIdentifier();
 
 // Parse a model identifier string; for example, into ("MacBookPro", 6, 1).
 // If any error occurs, none of the input pointers are touched.
 BASE_EXPORT bool ParseModelIdentifier(const std::string& ident,
                                       std::string* type,
                                       int32* major,
                                       int32* minor);
 
 }  // namespace mac
 }  // namespace base
 
 #endif  // BASE_MAC_MAC_UTIL_H_